WO2021251022A1 - Insulator, stator, and rotating electrical machine - Google Patents

Insulator, stator, and rotating electrical machine Download PDF

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Publication number
WO2021251022A1
WO2021251022A1 PCT/JP2021/016896 JP2021016896W WO2021251022A1 WO 2021251022 A1 WO2021251022 A1 WO 2021251022A1 JP 2021016896 W JP2021016896 W JP 2021016896W WO 2021251022 A1 WO2021251022 A1 WO 2021251022A1
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WO
WIPO (PCT)
Prior art keywords
coil
insulator
surface covering
teeth
winding
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Application number
PCT/JP2021/016896
Other languages
French (fr)
Japanese (ja)
Inventor
貴志 荒木
資康 望月
昌明 松本
Original Assignee
東芝産業機器システム株式会社
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Application filed by 東芝産業機器システム株式会社 filed Critical 東芝産業機器システム株式会社
Priority to JP2022530058A priority Critical patent/JPWO2021251022A1/ja
Priority to EP21822266.9A priority patent/EP4167442A1/en
Priority to US17/999,507 priority patent/US20230238848A1/en
Publication of WO2021251022A1 publication Critical patent/WO2021251022A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/325—Windings characterised by the shape, form or construction of the insulation for windings on salient poles, such as claw-shaped poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto
    • H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
    • H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/12—Machines characterised by the bobbins for supporting the windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/18—Windings for salient poles

Definitions

  • a flat wire may be used instead of the round wire as the coil.
  • the gap between the coils can be reduced as much as possible, so that the space factor of the coils can be improved.
  • the groove to be formed in the insulator also becomes square. Therefore, when the grooves are arranged in the radial direction to be formed, a gap must be formed between the adjacent grooves. Therefore, as a result, the space factor of the coil may decrease. Further, when trying to form a square groove, it is difficult to secure the thickness of the insulator as compared with the semicircular groove. If the insulator is formed by increasing the thickness of the insulator by the difference in the thickness of the insulator, the insulation distance between the tooth and the coil becomes unnecessarily long and the space factor of the coil also decreases. There was a possibility.
  • An object to be solved by the present invention is to provide an insulator, a stator, and a rotary electric machine that can prevent the coil from unwinding and improve the space factor of the coil when a flat wire is used as the coil. Is.
  • FIG. 1 is a plan view showing a rotary electric machine 1.
  • the rotary electric machine 1 includes a cylindrical stator 2 and a rotor 3 arranged radially inside the stator 2 and rotatably provided with respect to the stator 2.
  • the direction parallel to the rotation axis C of the rotor 3 is referred to as an axial direction
  • the rotation direction of the rotor 3 is referred to as a circumferential direction
  • the radial direction of the rotor 3 orthogonal to the axial direction and the circumferential direction is simply referred to as an axial direction. It is called the radial direction.
  • a guide 35 (guide piece) extending toward the second insulator 18 is formed in most of the radial center of the receiving recess 36.
  • the guide 35 extends downward in FIGS. 4 and 5.
  • the guide 35 functions as a guide for guiding the second insulator 18 to the receiving recesses 33, 34, 36.
  • the side end of the guide 35 facing the second insulator 18 is formed to be curved so as to have a convex shape that bulges toward the second insulator 18.
  • the outer wall portion 44 covers the inner side surface 12a of the divided iron core 12.
  • an outer receiving recess 53 is formed at an upper position in FIG. 6 via a step portion 53a.
  • the outer receiving recess 53 is formed at a position where the first insulator 17 and the second insulator 18 are connected.
  • the outer wall portion 44 has an outer wall protruding portion 47 projecting from the other end surface of the divided iron core 12 in the axial direction.
  • a coil extraction slit 48 is formed in the center of the outer wall protrusion 47 in the circumferential direction. The coil 10 wound around the insulator 9 is pulled out through the coil pull-out slit 48.
  • the direction in which the coil 10 is pulled out from the coil pull-out slit 48 toward the coil guide portion 49 is along the winding direction in which the coil 10 is wound.
  • the coil 10 drawn from the coil drawing slit 48 toward the coil guide portion 49 becomes the Nth winding coil 10 and is the last winding portion formed by the Nth winding.
  • the insulators 17 and 18 mounted on the teeth 8 form a winding coil accommodating recess 60 by the end face covering portions 21 and 41, the side covering portions 22 to 43, the outer wall portions 24 and 44, and the inner wall portions 25 and 45 (FIG. 2).
  • the coil 10 is wound around the insulator 9 mounted on the teeth 8 by a centralized winding method so that the coil 10 is housed in the winding coil accommodating recess 60.
  • a coil accommodating recess 38 is formed over the ridge portion 37 and the end face covering portion 21.
  • the coil 10 wound for the first time is housed in the coil accommodating recess 38.
  • the coil 10 wound for the first time is caught on the inner surface of the coil accommodating recess 38, so that the position of the coil 10 for the first time shifts when moving from the first winding process to the second winding process. Is prevented.
  • a raised portion 39 is formed in the central portion in the radial direction.
  • the width W3 between the raised portion 39 and the outer wall portion 24 is a width in which four coils 10 can be accommodated.
  • the radial width W2 of the raised portion 39 is slightly smaller than the two longitudinal widths of the coil 10.
  • the protruding height H2 of the raised portion 39 is about 1 ⁇ 2 of the width of the coil 10 in the lateral direction. Therefore, the second side surface covering portion 23 is raised when moving from the fourth winding step to the fifth winding step and when moving from the fifth winding step to the sixth winding step.
  • the coil 10 is arranged on the portion 39. In the second side surface covering portion 23, the coil 10 of the 5th and 6th times and the coil 10 of the 4th and 7th times and thereafter are arranged so as to be offset by about half the height in the lateral direction of the coil 10.
  • the twelfth winding process of the coil 10 is performed on the eleventh coil 10. Then, the 12th and subsequent winding steps of the coil 10 are sequentially performed so as to return to the divided iron core 12 (outer wall portions 24, 44).
  • the 22nd coil 10 is again arranged at a position closest to the divided iron core 12 (outer wall portions 24, 44) of the winding coil accommodating recess 60.
  • the 23rd winding step of the coil 10 is performed on the 22nd coil 10. After that, the winding step of the coil 10 proceeds so as to reciprocate along the radial direction again.
  • the ridge portion 37 formed at the end of the outer wall portion 24 is arranged at a position where the first winding step of the coil 10 is completed.
  • the ridge portion 37 is arranged at the position of the coil 10 of the first winding. Therefore, it is possible to reliably prevent the position of the first coil 10 from being displaced when proceeding to the second winding step of the coil 10.
  • a raised portion 39 is formed on the second side surface covering portion 23 facing the first side surface covering portion 22 in the circumferential direction. That is, in the winding process of the coil 10, the raised portion 39 is formed on the second side surface covering portion 23 to which the coil 10 is finally drawn.
  • the width W3 between the raised portion 39 and the outer wall portion 24 is a width in which four coils 10 can be accommodated. That is, the width W3 between the raised portion 39 and the outer wall portion 24 is about four times the width in the longitudinal direction of the coil 10. Therefore, the coils 10 can be aligned without a gap between the raised portion 39 and the outer wall portion 24. Further, even when the coil 10 is wound so as to be folded back in the middle of the winding coil accommodating recess 60 in the radial direction, the misalignment of the coil 10 can be reliably prevented. That is, in the present embodiment, it is possible to reliably prevent the coil 10 from being displaced when proceeding from the 50th winding step to the 51st winding step.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

An insulator according to the embodiment is fit into teeth radially extending from one side surface of an annular iron stator core in a radial direction. The insulator leads to secure insulation of the teeth from a flat wire that is wound around each of the teeth plural times. The insulator includes an end face covering part, two side face covering parts, a first wall part, a second wall part, a ridge part, and a recess part. The end face covering part covers an end face of the tooth in an axial direction. The two side face covering parts cover both side faces of the tooth in a circumferential direction. Part of the flat wire which is wound around the tooth the first time in the plural times is disposed on, and the ridge part and the recess part are formed on one of the two side face covering parts.

Description

インシュレータ、固定子、及び回転電機Insulators, stators, and rotary machines
　本発明の実施形態は、インシュレータ、固定子、及び回転電機に関する。 The embodiment of the present invention relates to an insulator, a stator, and a rotary electric machine.
　固定子と回転子とを備えた回転電機が知られている。固定子は、例えば、円環状の固定子鉄心と、固定子鉄心の内周面から径方向内側に向かって突出された複数のティースと、ティースに巻回されたコイルと、ティースに装着されティースとコイルとの間の絶縁を確保するためのインシュレータと、を備える。インシュレータは、例えば、ティースの周囲を被覆する被覆部と、被覆部の径方向両側から立ち上がる壁部と、を備える。被覆部と壁部とにより形成される凹部に、コイルが収納される。 A rotary electric machine equipped with a stator and a rotor is known. The stator is, for example, an annular stator core, a plurality of teeth protruding radially inward from the inner peripheral surface of the stator core, a coil wound around the teeth, and a teeth attached to the teeth. It is provided with an insulator for ensuring insulation between the coil and the coil. The insulator includes, for example, a covering portion that covers the periphery of the tooth and a wall portion that rises from both radial sides of the covering portion. The coil is housed in the recess formed by the covering portion and the wall portion.
　回転子は、例えば、固定子の径方向内側に回転自在に配置された円柱状の回転子鉄心と、回転子鉄心に設けられたマグネットと、を備える。
　このような構成のもと、コイルに電流を供給すると、各ティースに鎖交磁束が発生する。この鎖交磁束と回転子のマグネットとの間で磁気的な吸引力や反発力が生じ、回転子が回転される。 The rotor includes, for example, a columnar rotor core rotatably arranged inside the stator in the radial direction, and a magnet provided on the rotor core.
Under such a configuration, when a current is supplied to the coil, an interlinkage magnetic flux is generated in each tooth. A magnetic attraction or repulsion is generated between this interlinkage magnetic flux and the rotor magnet, and the rotor is rotated.
　ここで、ティースにインシュレータを介してコイルを巻回する際、このコイルの巻き崩れによってコイルの占積率が低下してしまう場合がある。このため、コイルの巻き崩れを防止するためのさまざまな技術が提案されている。
　例えば、コイルとして丸線を用いる場合、インシュレータの被覆部に丸線の形状に対応する半円状の溝を径方向に並べて形成する技術が開示されている。溝にコイルが収まることによりインシュレータ上でのコイルのずれを防止し、この結果コイルの巻き崩れを防止できる。 Here, when the coil is wound around the teeth via an insulator, the space factor of the coil may decrease due to the unwinding of the coil. Therefore, various techniques for preventing the coil from unwinding have been proposed.
For example, when a round wire is used as a coil, a technique for forming semicircular grooves corresponding to the shape of the round wire in the covering portion of the insulator by arranging them in the radial direction is disclosed. By fitting the coil in the groove, it is possible to prevent the coil from shifting on the insulator, and as a result, it is possible to prevent the coil from unwinding.
　ところで、コイルの占積率を向上させるために、コイルとして丸線に代わって平角線を用いる場合がある。平角線を用いることで、コイル間の隙間を極力減少させることができるので、コイルの占積率を向上できる。 By the way, in order to improve the space factor of the coil, a flat wire may be used instead of the round wire as the coil. By using the flat wire, the gap between the coils can be reduced as much as possible, so that the space factor of the coils can be improved.
　しかしながら、コイルとして平角線を用いる場合、インシュレータに形成しようとする溝も四角状になる。このため、溝を径方向に並べて形成しようとすると、隣り合う溝の間に隙間を形成しなければならない。このため、結果的にコイルの占積率が低下してしまう可能性があった。
　また、四角状の溝を形成しようとした場合、半円状の溝と比較してインシュレータの厚さが確保しづらい。このようなインシュレータの厚さの差分だけインシュレータの厚さを大きくしてインシュレータを形成すると、無駄にティースとコイルとの間の絶縁距離が長くなってしまうとともにコイルの占積率も低下してしまう可能性があった。 However, when a flat wire is used as the coil, the groove to be formed in the insulator also becomes square. Therefore, when the grooves are arranged in the radial direction to be formed, a gap must be formed between the adjacent grooves. Therefore, as a result, the space factor of the coil may decrease.
Further, when trying to form a square groove, it is difficult to secure the thickness of the insulator as compared with the semicircular groove. If the insulator is formed by increasing the thickness of the insulator by the difference in the thickness of the insulator, the insulation distance between the tooth and the coil becomes unnecessarily long and the space factor of the coil also decreases. There was a possibility.
日本国特開２０１５－１３３８０８号公報Japanese Patent Application Laid-Open No. 2015-133808
　本発明が解決しようとする課題は、コイルとして平角線を用いた場合に、コイルの巻き崩れを防止し、かつ、コイルの占積率を向上できるインシュレータ、固定子、及び回転電機を提供することである。 An object to be solved by the present invention is to provide an insulator, a stator, and a rotary electric machine that can prevent the coil from unwinding and improve the space factor of the coil when a flat wire is used as the coil. Is.
　実施形態のインシュレータは、環状の固定子鉄心の径方向における一側面から前記径方向に沿って延びるティースに装着される。実施形態のインシュレータは、前記ティースに複数の巻数で巻回される平角線と前記ティースとの絶縁を確保する。実施形態のインシュレータは、端面被覆部と、２つの側面被覆部と、第１壁部と、第２壁部と、凸条部と、凹部とを持つ。前記端面被覆部は、前記ティースの軸方向における端面を覆う。前記２つの側面被覆部は、前記ティースの周方向における両側面を覆う。前記第１壁部は、前記端面被覆部及び前記２つの側面被覆部における前記径方向の一端から立ち上がる。第２壁部は、前記端面被覆部及び前記２つの側面被覆部における前記径方向の他端から立ち上がる。前記凸条部は、前記第１壁部の側端及び前記第２壁部の側端の少なくともいずれか一方に突出して形成され、前記軸方向に延びる。前記凹部は、前記凸条部と前記端面被覆部とに渡って形成され、前記平角線を収容する。前記２つの側面被覆部のうち一方の側面被覆部には、前記複数の巻数で前記ティースに巻回される前記平角線のうちの第１巻き目の前記平角線が配置され、かつ、前記凸条部及び前記凹部が形成されている。 The insulator of the embodiment is attached to a tooth extending along the radial direction from one side surface of the annular stator core in the radial direction. The insulator of the embodiment secures the insulation between the flat wire wound around the tooth with a plurality of turns and the tooth. The insulator of the embodiment has an end face covering portion, two side surface covering portions, a first wall portion, a second wall portion, a convex portion, and a concave portion. The end face covering portion covers the end face of the tooth in the axial direction. The two side coverings cover both sides of the tooth in the circumferential direction. The first wall portion rises from one of the radial ends of the end face covering portion and the two side surface covering portions. The second wall portion rises from the radial other ends of the end face covering portion and the two side surface covering portions. The ridge portion is formed so as to project from at least one of the side end of the first wall portion and the side end of the second wall portion, and extends in the axial direction. The concave portion is formed over the convex portion and the end face covering portion, and accommodates the flat wire. The flat wire of the first roll of the flat wire wound around the tooth with the plurality of turns is arranged on the side covering portion of one of the two side covering portions, and the convex wire is arranged. The strip and the recess are formed.
実施形態の回転電機を示す平面図。The plan view which shows the rotary electric machine of embodiment. 実施形態の分割固定子を示す斜視図。The perspective view which shows the split stator of embodiment. 図２のＡ－Ａ線に沿う断面図。FIG. 2 is a cross-sectional view taken along the line AA of FIG. 実施形態の第１インシュレータを示す一方側から見た斜視図。A perspective view showing the first insulator of the embodiment as viewed from one side. 実施形態の第１インシュレータを示す他方側から見た斜視図。The perspective view from the other side which shows the 1st insulator of an embodiment. 実施形態の第２インシュレータを示す径方向内側から見た斜視図。FIG. 3 is a perspective view seen from the inside in the radial direction showing the second insulator of the embodiment.
　以下、実施形態の回転電機を、図面を参照して説明する。 Hereinafter, the rotary electric machine of the embodiment will be described with reference to the drawings.
　図１は、回転電機１を示す平面図である。
　回転電機１は、円筒状の固定子２と、固定子２の径方向内側に配置され固定子２に対して回転自在に設けられた回転子３と、を備える。
　以下の説明では、回転子３の回転軸線Ｃと平行な方向を軸方向と称し、回転子３の回転方向を周方向と称し、軸方向及び周方向に直交する回転子３の径方向を単に径方向と称する。 FIG. 1 is a plan view showing a rotary electric machine 1.
The rotary electric machine 1 includes a cylindrical stator 2 and a rotor 3 arranged radially inside the stator 2 and rotatably provided with respect to the stator 2.
In the following description, the direction parallel to the rotation axis C of the rotor 3 is referred to as an axial direction, the rotation direction of the rotor 3 is referred to as a circumferential direction, and the radial direction of the rotor 3 orthogonal to the axial direction and the circumferential direction is simply referred to as an axial direction. It is called the radial direction.
　回転子３は、回転軸線Ｃ回りに回転するシャフト４と、シャフト４の外周面に嵌合された回転子鉄心５と、を備える。回転子鉄心５の径方向中央に軸方向に貫通する貫通孔５ａが形成されている。この貫通孔５ａに、シャフト４が例えば、圧入により固定されている。回転子鉄心５の外周部寄りには、図示しない複数のマグネットが周方向に並んで設けられている。 The rotor 3 includes a shaft 4 that rotates around the rotation axis C, and a rotor core 5 fitted to the outer peripheral surface of the shaft 4. A through hole 5a penetrating in the axial direction is formed in the radial center of the rotor core 5. The shaft 4 is fixed to the through hole 5a by, for example, press fitting. A plurality of magnets (not shown) are provided side by side in the circumferential direction near the outer peripheral portion of the rotor core 5.
　固定子２は、円筒状の固定子ケース６の内周面に嵌合固定されている。固定子ケース６及び固定子２の軸方向は、回転軸線Ｃと一致している。固定子２は、円筒状の固定子鉄心７と、固定子鉄心７の内周面７ａから径方向内側に向かって突出形成された複数（例えば、本実施形態では２４個）のティース８と、ティース８の周囲を被覆するように装着された絶縁性のインシュレータ９と、各ティース８におけるインシュレータ９に集中巻き方式により巻回されるコイル１０と、を備える。 The stator 2 is fitted and fixed to the inner peripheral surface of the cylindrical stator case 6. The axial direction of the stator case 6 and the stator 2 coincides with the rotation axis C. The stator 2 includes a cylindrical stator core 7 and a plurality of (for example, 24 in this embodiment) teeth 8 protruding inward in the radial direction from the inner peripheral surface 7a of the stator core 7. An insulating insulator 9 mounted so as to cover the periphery of the teeth 8 and a coil 10 wound around the insulator 9 in each teeth 8 by a centralized winding method are provided.
　ここで、固定子２は、周方向に分割可能な方式が採用されている。すなわち、固定子２は、ティース８ごとに周方向に分割された分割固定子１１を環状に連結して構成される。本実施形態では、分割固定子１１の個数は、２４個となる。換言すると、本実施形態では、２４個の分割固定子１１によって固定子２が構成されている。 Here, the stator 2 adopts a method that can be divided in the circumferential direction. That is, the stator 2 is configured by connecting the divided stators 11 divided in the circumferential direction for each tooth 8 in an annular shape. In the present embodiment, the number of the split stators 11 is 24. In other words, in the present embodiment, the stator 2 is composed of 24 split stators 11.
　図２は、分割固定子１１を示す斜視図である。図３は、図２のＡ－Ａ線に沿う断面図である。
　図２、図３に示すように、分割固定子１１は、固定子鉄心７が分割された分割鉄心１２を有する。分割鉄心１２は、周方向に延びる。分割鉄心１２は、例えば、複数の金属板を積層したり軟磁性粉を加圧成形したりすることによって構成されている。 FIG. 2 is a perspective view showing the split stator 11. FIG. 3 is a cross-sectional view taken along the line AA of FIG.
As shown in FIGS. 2 and 3, the split stator 11 has a split core 12 in which the stator core 7 is divided. The split iron core 12 extends in the circumferential direction. The divided iron core 12 is configured, for example, by laminating a plurality of metal plates or pressure-molding soft magnetic powder.
　分割鉄心１２は、分割固定子１１を環状に連結したときに固定子鉄心７の環状の磁路を形成する箇所である。分割鉄心１２は、軸方向に直交する断面形状が円弧状となるように形成されている。
　分割鉄心１２の周方向における両端部には、連結部１３ａ，１３ｂが形成されている。互いに隣り合う２つの分割鉄心１２は、連結部１３ａ，１３ｂにおいて連結される。具体的には、互いに隣り合う２つの分割鉄心１２のうち一方の分割鉄心（第１分割鉄心）の連結部１３ａが他方の分割鉄心（第２分割鉄心）の連結部１３ｂに圧入されることで、２つの分割鉄心１２が連結される。２つの連結部１３ａ，１３ｂのうち、一方の連結部１３ａ（第１連結部）は、凸形状に形成されている。２つの連結部１３ａ，１３ｂのうち、他方の連結部１３ｂ（第２連結部）は、連結部１３ａを受け入れ可能な凹形状に形成されている。このような構成を有する分割鉄心１２は、ティース８を備える。ティース８は、分割鉄心１２の周方向における中央位置から径方向内側に向かって突出するように形成されている。 The split core 12 is a portion that forms an annular magnetic path of the stator core 7 when the split stator 11 is connected in an annular shape. The split iron core 12 is formed so that the cross-sectional shape orthogonal to the axial direction is an arc shape.
Connecting portions 13a and 13b are formed at both ends of the divided iron core 12 in the circumferential direction. The two divided iron cores 12 adjacent to each other are connected at the connecting portions 13a and 13b. Specifically, the connecting portion 13a of one of the two split cores 12 adjacent to each other (first split core) is press-fitted into the connecting portion 13b of the other split core (second split core). Two split iron cores 12 are connected. Of the two connecting portions 13a and 13b, one of the connecting portions 13a (first connecting portion) is formed in a convex shape. Of the two connecting portions 13a and 13b, the other connecting portion 13b (second connecting portion) is formed in a concave shape that can accept the connecting portion 13a. The split iron core 12 having such a configuration includes a teeth 8. The teeth 8 are formed so as to project inward in the radial direction from the central position in the circumferential direction of the split iron core 12.
　ティース８は、径方向に沿って延びるティース本体１４と、鍔部１５と、を備える。鍔部１５は、ティース本体１４の径方向内側の端部に位置する。鍔部１５は、ティース本体１４と一体に成形されている。鍔部１５は、ティース本体１４の先端部における周方向両側に沿って延びる。
　これによって、ティース本体１４と鍔部１５と分割鉄心１２（後述する分割鉄心１２の内側面１２ａ）とに囲まれたコイル収納凹部１６ａが形成される。コイル収納凹部１６ａには、複数の巻数でコイル１０（平角線）が巻回される。コイル収納凹部１６ａは、固定子２において周方向に隣り合うティース８間に形成されるスロット１６を構成する。 The teeth 8 includes a teeth body 14 extending along the radial direction and a flange portion 15. The flange portion 15 is located at the radial inner end of the tooth body 14. The flange portion 15 is integrally molded with the tooth body 14. The flange portion 15 extends along both sides in the circumferential direction at the tip portion of the tooth body 14.
As a result, a coil storage recess 16a surrounded by the tooth body 14, the flange portion 15, and the split iron core 12 (the inner side surface 12a of the split core 12 described later) is formed. The coil 10 (flat wire) is wound around the coil storage recess 16a with a plurality of turns. The coil accommodating recess 16a constitutes a slot 16 formed between the teeth 8 adjacent to each other in the circumferential direction in the stator 2.
　インシュレータ９は、第１インシュレータ１７と、第２インシュレータ１８とによって構成されている。第１インシュレータ１７及び第２インシュレータ１８は、ティース８の軸方向において互いに分離又は結合が可能である。
　第１インシュレータ１７は、ティース８の軸方向における一方方向（例えば、ティース８の上方から下方に向かう方向）に沿って移動することで、ティース８に装着される。
　第２インシュレータ１８は、ティース８の軸方向における他方方向（例えば、ティース８の下方から上方に向かう方向）に沿って移動することで、ティース８に装着される。
　つまり、インシュレータ９は、２つのインシュレータが軸方向に分割可能な分割構成を有する。
　ティース８にインシュレータ９が装着された状態では、第１インシュレータ１７と第２インシュレータ１８とは隙間なく重なり合う。第１インシュレータ１７と第２インシュレータ１８との間からティース８が露出されることがない。詳細は後述するが、コイル１０は、インシュレータ９が装着されたティース８に巻回される。コイル１０をティース８に巻回する工程においては、コイル１０が最初に第１インシュレータ１７に巻回される（巻き始め）。ティース８に対するコイル１０の巻回が終了した後、コイル１０の巻き終わり端は、第２インシュレータ１８から引き出される。
　換言すると、コイル１０はティース８にＮ回巻回されている。ここで、Ｎは、２以上の整数ある。Ｎ回は複数回を意味する。つまり、コイル１０は、第１巻き目から第Ｎ巻き目の巻数で、ティース８に巻回されている。また、コイル１０をティース８に巻回する工程を考慮すると、第１巻き目のコイル１０は、１回目の巻回によって形成される最初の巻回部（第１巻回部）である。第Ｎ巻き目のコイル１０は、Ｎ回目の巻回によって形成される最後の巻回部（第Ｎ巻回部）である。なお、後述するように、本実施形態におけるＮ回は、例えば、５３回である。なお、以下の説明では、「５４回目のコイル１０」という文言があるが、この５４回目のコイル１０は、完全に１回分だけティース８に巻回されないコイルである。 The insulator 9 is composed of a first insulator 17 and a second insulator 18. The first insulator 17 and the second insulator 18 can be separated or coupled to each other in the axial direction of the teeth 8.
The first insulator 17 is attached to the teeth 8 by moving along one direction in the axial direction of the teeth 8 (for example, a direction from the upper side to the lower side of the teeth 8).
The second insulator 18 is attached to the teeth 8 by moving along the other direction in the axial direction of the teeth 8 (for example, the direction from the lower side to the upper side of the teeth 8).
That is, the insulator 9 has a divided configuration in which two insulators can be divided in the axial direction.
When the insulator 9 is attached to the teeth 8, the first insulator 17 and the second insulator 18 overlap each other without a gap. The teeth 8 are not exposed between the first insulator 17 and the second insulator 18. Although the details will be described later, the coil 10 is wound around the teeth 8 to which the insulator 9 is mounted. In the step of winding the coil 10 around the teeth 8, the coil 10 is first wound around the first insulator 17 (start of winding). After the winding of the coil 10 with respect to the teeth 8 is completed, the winding end end of the coil 10 is pulled out from the second insulator 18.
In other words, the coil 10 is wound N times around the teeth 8. Here, N is an integer of 2 or more. N times means multiple times. That is, the coil 10 is wound around the teeth 8 with the number of turns from the first winding to the Nth winding. Further, considering the step of winding the coil 10 around the teeth 8, the first winding coil 10 is the first winding portion (first winding portion) formed by the first winding. The Nth winding coil 10 is the last winding portion (Nth winding portion) formed by the Nth winding. As will be described later, the N times in this embodiment is, for example, 53 times. In the following description, there is the phrase "54th coil 10", but the 54th coil 10 is a coil that is not completely wound around the teeth 8 only once.
　図４は、第１インシュレータ１７を一方側から見た斜視図である。図５は、第１インシュレータ１７を他方側から見た斜視図である。
　図３から図５に示すように、第１インシュレータ１７は、ティース８の軸方向における一端面（第１ティース端面）を覆う端面被覆部２１と、ティース８の周方向における両側面を覆う２つの側面被覆部２２，２３（第１側面被覆部２２、第２側面被覆部２３）と、各被覆部２１～２３の径方向における外側端に一体に成形されている外壁部２４（第１壁部）と、各被覆部２１～２３の径方向における内側端に一体に成形されている内壁部２５（第２壁部）と、を備えている。第２側面被覆部２３は、第１インシュレータ１７における第１側面被覆部２２とは反対側に位置する。 FIG. 4 is a perspective view of the first insulator 17 as viewed from one side. FIG. 5 is a perspective view of the first insulator 17 as viewed from the other side.
As shown in FIGS. 3 to 5, the first insulator 17 includes an end face covering portion 21 that covers one end surface (first tooth end face) of the teeth 8 in the axial direction and two covering both side surfaces of the teeth 8 in the circumferential direction. The outer wall portion 24 (first wall portion) integrally formed with the side surface covering portions 22 and 23 (first side surface covering portion 22 and second side surface covering portion 23) and the outer ends of the respective covering portions 21 to 23 in the radial direction. ), And an inner wall portion 25 (second wall portion) integrally molded at the inner end of each of the covering portions 21 to 23 in the radial direction. The second side surface covering portion 23 is located on the side opposite to the first side surface covering portion 22 in the first insulator 17.
　外壁部２４は、分割鉄心１２の内側面１２ａを被覆する。外壁部２４の内側面２４ａには、図４、図５における下側の位置に、外側受入れ凹部３３が段差部３３ａを介して形成されている。外側受入れ凹部３３は、第１インシュレータ１７と第２インシュレータ１８とが接続される位置に形成されている。
　外側受入れ凹部３３は、第２インシュレータ１８を受け入れる凹部である。外側受入れ凹部３３は、第２インシュレータ１８と径方向で重なる。
　外壁部２４は、端面被覆部２１及び側面被覆部２２、２３における径方向の一端（径方向の外側の位置）からティース８の軸方向に立ち上がるように設けられている。 The outer wall portion 24 covers the inner side surface 12a of the divided iron core 12. On the inner side surface 24a of the outer wall portion 24, an outer receiving recess 33 is formed at a lower position in FIGS. 4 and 5 via a step portion 33a. The outer receiving recess 33 is formed at a position where the first insulator 17 and the second insulator 18 are connected.
The outer receiving recess 33 is a recess for receiving the second insulator 18. The outer receiving recess 33 radially overlaps with the second insulator 18.
The outer wall portion 24 is provided so as to rise in the axial direction of the teeth 8 from one end in the radial direction (position outside the radial direction) in the end face covering portion 21 and the side covering portions 22 and 23.
　また、外壁部２４は、分割鉄心１２の軸方向における一端面から突出する外壁突出部２７を有する。外壁突出部２７の周方向における中央には、コイル導入スリット２８が形成されている。コイル導入スリット２８は、外壁部２４の径方向外側から径方向内側へとコイル１０を導く溝である。
　外壁部２４の径方向外側から径方向内側へコイル１０を導く方向は、コイル１０を巻回する巻回方向に沿っている。換言すると、コイル導入スリット２８によって導かれたコイル１０は、第１巻き目のコイル１０となり、１回目の巻回によって形成される最初の巻回部である。 Further, the outer wall portion 24 has an outer wall protruding portion 27 protruding from one end surface of the divided iron core 12 in the axial direction. A coil introduction slit 28 is formed in the center of the outer wall protrusion 27 in the circumferential direction. The coil introduction slit 28 is a groove that guides the coil 10 from the radial outside to the radial inside of the outer wall portion 24.
The direction in which the coil 10 is guided from the radial outer side to the radial inner side of the outer wall portion 24 is along the winding direction in which the coil 10 is wound. In other words, the coil 10 guided by the coil introduction slit 28 becomes the coil 10 of the first winding, and is the first winding portion formed by the first winding.
　コイル導入スリット２８は、径方向及び周方向に交差するように軸方向からみて斜めに延びて形成されている。より具体的には、コイル導入スリット２８は、径方向外側から径方向内側に向かうように、かつ、第１側面被覆部２２から第２側面被覆部２３に向かうように、斜めに延びている。換言すると、コイル導入スリット２８は、第１側面被覆部２２から第２側面被覆部２３に向かう方向に対して傾斜する方向に延びている。コイル導入スリット２８の径方向における外側端、及び径方向における内側端は、開口されている。つまり、コイル導入スリット２８の径方向における外側端の開口よりも径方向における内側端の開口が、第２側面被覆部２３寄りに配置されている。 The coil introduction slit 28 is formed so as to extend diagonally when viewed from the axial direction so as to intersect in the radial direction and the circumferential direction. More specifically, the coil introduction slit 28 extends diagonally from the radial outer side to the radial inner side and from the first side surface covering portion 22 toward the second side surface covering portion 23. In other words, the coil introduction slit 28 extends in a direction inclined with respect to the direction from the first side surface covering portion 22 toward the second side surface covering portion 23. The outer end in the radial direction and the inner end in the radial direction of the coil introduction slit 28 are open. That is, the opening at the inner end in the radial direction is arranged closer to the second side surface covering portion 23 than the opening at the outer end in the radial direction of the coil introduction slit 28.
　外壁突出部２７の外側面２７ａには、コイル押え壁２９が形成されている。コイル押え壁２９は、外壁部２４の径方向外側で引き回されるコイル１０（渡り線）を収納する。コイル押え壁２９は、底壁部２９ａと側壁部２９ｂとを備える。底壁部２９ａは、外壁突出部２７の根元（外壁部２４における分割鉄心１２の軸方向における一端面に近い位置）から径方向外側に向かって突出する。側壁部２９ｂは、底壁部２９ａの径方向における外側端から外壁突出部２７と平行に立ち上がる。これら底壁部２９ａ及び側壁部２９ｂと、外壁突出部２７とにより、コイル１０の渡り線部を収納する渡り線収納部３０が形成される。渡り線収納部３０を構成する外壁突出部２７の外側面２７ａの一部には、凹部３１が形成されている。凹部３１は、コイル導入スリット２８を避けるように配置されている。凹部３１は、軸方向からみて四角形状に形成されている。 A coil pressing wall 29 is formed on the outer surface 27a of the outer wall protruding portion 27. The coil pressing wall 29 houses the coil 10 (crossover wire) routed on the radial outside of the outer wall portion 24. The coil pressing wall 29 includes a bottom wall portion 29a and a side wall portion 29b. The bottom wall portion 29a protrudes outward in the radial direction from the root of the outer wall protruding portion 27 (a position close to one end surface of the divided iron core 12 in the outer wall portion 24 in the axial direction). The side wall portion 29b rises in parallel with the outer wall protruding portion 27 from the outer end in the radial direction of the bottom wall portion 29a. The bottom wall portion 29a, the side wall portion 29b, and the outer wall protruding portion 27 form a crossover storage portion 30 for accommodating the crossover portion of the coil 10. A recess 31 is formed in a part of the outer surface 27a of the outer wall protruding portion 27 constituting the crossover storage portion 30. The recess 31 is arranged so as to avoid the coil introduction slit 28. The recess 31 is formed in a rectangular shape when viewed from the axial direction.
　内壁部２５は、ティース８を構成する鍔部１５の内側面１５ａ（径方向外側の面）を被覆する。内壁部２５の内側面２５ａには、図４、図５における下側の位置に、内側受入れ凹部３４が段差部３４ａを介して形成されている。内側受入れ凹部３４は、第１インシュレータ１７と第２インシュレータ１８とが接続される位置に形成されている。
　内側受入れ凹部３４は、第２インシュレータ１８を受け入れる凹部である。内側受入れ凹部３３は、第２インシュレータ１８と径方向で重なる。
　内壁部２５は、端面被覆部２１及び側面被覆部２２、２３における径方向の他端（径方向の内側の位置）からティース８の軸方向に立ち上がるように設けられている。
　また、内壁部２５は、鍔部１５の軸方向における一端面から突出する内壁突出部３２を有する。鍔部１５から突出する内壁突出部３２の突出高さと、分割鉄心１２から突出する外壁突出部２７の突出高さとは、ほぼ同一である。 The inner wall portion 25 covers the inner side surface 15a (diametrically outer surface) of the flange portion 15 constituting the teeth 8. On the inner side surface 25a of the inner wall portion 25, an inner receiving recess 34 is formed at a lower position in FIGS. 4 and 5 via a step portion 34a. The inner receiving recess 34 is formed at a position where the first insulator 17 and the second insulator 18 are connected.
The inner receiving recess 34 is a recess for receiving the second insulator 18. The inner receiving recess 33 radially overlaps with the second insulator 18.
The inner wall portion 25 is provided so as to rise in the axial direction of the teeth 8 from the other end in the radial direction (position inside the radial direction) in the end face covering portion 21 and the side surface covering portions 22 and 23.
Further, the inner wall portion 25 has an inner wall protruding portion 32 protruding from one end surface of the flange portion 15 in the axial direction. The protruding height of the inner wall protruding portion 32 protruding from the flange portion 15 and the protruding height of the outer wall protruding portion 27 protruding from the split iron core 12 are substantially the same.
　２つの側面被覆部２２，２３の外側面２２ａ，２３ａには、図４、図５における下側の位置に、受入れ凹部３６が段差部３６ａを介して形成されている。受入れ凹部３６は、第１インシュレータ１７と第２インシュレータ１８とが接続される位置に形成されている。
　受入れ凹部３６は、第２インシュレータ１８を受け入れる凹部である。受入れ凹部３６は、第２インシュレータ１８と径方向で重なる。受入れ凹部３３の段差部３３ａ，受入れ凹部３４の段差部３４ａ，受入れ凹部３６の段差部３６ａは、同一高さを有し、滑らかに連なっている。 On the outer surfaces 22a and 23a of the two side surface covering portions 22 and 23, a receiving recess 36 is formed at a lower position in FIGS. 4 and 5 via a stepped portion 36a. The receiving recess 36 is formed at a position where the first insulator 17 and the second insulator 18 are connected.
The receiving recess 36 is a recess for receiving the second insulator 18. The receiving recess 36 radially overlaps with the second insulator 18. The stepped portion 33a of the receiving recess 33, the stepped portion 34a of the receiving recess 34, and the stepped portion 36a of the receiving recess 36 have the same height and are smoothly connected to each other.
　また、受入れ凹部３６の径方向の中央における大部分の領域には、第２インシュレータ１８に向けて延出するガイド３５（ガイド片）が形成されている。ガイド３５は、図４、図５における下側に向けて延出する。ガイド３５は、各受入れ凹部３３，３４，３６に第２インシュレータ１８を導く際のガイドとして機能する。第２インシュレータ１８に面するガイド３５の側端は、第２インシュレータ１８に向けて膨出する凸形状となるように湾曲して形成されている。 Further, a guide 35 (guide piece) extending toward the second insulator 18 is formed in most of the radial center of the receiving recess 36. The guide 35 extends downward in FIGS. 4 and 5. The guide 35 functions as a guide for guiding the second insulator 18 to the receiving recesses 33, 34, 36. The side end of the guide 35 facing the second insulator 18 is formed to be curved so as to have a convex shape that bulges toward the second insulator 18.
　２つの側面被覆部２２，２３のうち、第１側面被覆部２２には、第１側面被覆部２２から突出する凸条部３７が形成されている。具体的に、外壁部２４に繋がる第１側面被覆部２２の端部に、凸条部３７（第１凸条部）が形成されている。内壁部２５に繋がる第１側面被覆部２２の端部に、凸条部３７（第２凸条部）が形成されている。凸条部３７は、端面被覆部２１の表面２１ａと同一の面上にある位置と、受入れ凹部３６の段差部３６ａと同一の面上にある位置との間の領域に形成されている。凸条部３７は、軸方向に延びている。端面被覆部２１に位置する凸条部３７の側端、及び、端面被覆部２１の表面２１ａには、コイル収容凹部３８（凹部）が形成されている。コイル収容凹部３８は、凸条部３７と端面被覆部２１とに渡って形成されている。コイル収容凹部３８は、凸条部３７の角部と端面被覆部２１の表面２１ａの一部とを平面取りした形状を有する。凸条部３７の突出高さＨ１、及び径方向の幅Ｗ１の詳細は、後述する。 Of the two side surface covering portions 22 and 23, the first side surface covering portion 22 is formed with a ridge portion 37 protruding from the first side surface covering portion 22. Specifically, a ridge portion 37 (first ridge portion) is formed at an end portion of the first side surface covering portion 22 connected to the outer wall portion 24. A ridge 37 (second ridge) is formed at the end of the first side surface covering portion 22 connected to the inner wall portion 25. The ridge portion 37 is formed in a region between a position on the same surface as the surface 21a of the end surface covering portion 21 and a position on the same surface as the step portion 36a of the receiving recess 36. The ridge portion 37 extends in the axial direction. A coil accommodating recess 38 (recess) is formed on the side end of the ridge portion 37 located on the end face covering portion 21 and on the surface 21a of the end face covering portion 21. The coil accommodating recess 38 is formed over the ridge portion 37 and the end face covering portion 21. The coil accommodating recess 38 has a shape in which the corner portion of the convex portion 37 and a part of the surface 21a of the end surface covering portion 21 are flattened. Details of the protrusion height H1 of the ridge portion 37 and the radial width W1 will be described later.
　２つの側面被覆部２２，２３のうち、第２側面被覆部２３には、径方向の中央部に、嵩上げ部３９が形成されている。嵩上げ部３９も、端面被覆部２１の表面２１ａと同一の面上にある位置と、受入れ凹部３６の段差部３６ａと同一の面上にある位置との間の領域に形成されている。嵩上げ部３９は、軸方向に延びている。嵩上げ部３９の突出高さＨ２、及び径方向の幅Ｗ２の詳細は、後述する。 Of the two side surface covering portions 22 and 23, the second side surface covering portion 23 is formed with a raised portion 39 at the central portion in the radial direction. The raised portion 39 is also formed in a region between a position on the same surface as the surface 21a of the end surface covering portion 21 and a position on the same surface as the stepped portion 36a of the receiving recess 36. The raised portion 39 extends in the axial direction. Details of the protruding height H2 of the raised portion 39 and the radial width W2 will be described later.
　図６は、第２インシュレータ１８を径方向内側から見た斜視図である。
　図２、図６に示すように、第２インシュレータ１８は、ティース８の軸方向における他端面（第２ティース端面）を覆う端面被覆部４１と、ティース８の周方向における両側面を覆う２つの側面被覆部４２，４３（第１側面被覆部４２、第２側面被覆部４３）と、各被覆部４１～４３の径方向における外側端に一体に成形されている外壁部４４と、各被覆部４１～４３の径方向における内側端に一体に成形されている内壁部４５と、を備えている。 FIG. 6 is a perspective view of the second insulator 18 as viewed from the inside in the radial direction.
As shown in FIGS. 2 and 6, the second insulator 18 has an end surface covering portion 41 that covers the other end surface (second tooth end surface) of the teeth 8 in the axial direction and two covering both side surfaces of the teeth 8 in the circumferential direction. The side surface covering portions 42, 43 (first side surface covering portion 42, second side surface covering portion 43), an outer wall portion 44 integrally molded at the outer end of each of the covering portions 41 to 43 in the radial direction, and each covering portion. It includes an inner wall portion 45 integrally molded at the inner end in the radial direction of 41 to 43.
　外壁部４４は、分割鉄心１２の内側面１２ａを被覆する。外壁部４４の外側面４４ａには、図６における上側の位置に、外側受入れ凹部５３が段差部５３ａを介して形成されている。外側受入れ凹部５３は、第１インシュレータ１７と第２インシュレータ１８とが接続される位置に形成されている。
　また、外壁部４４は、分割鉄心１２の軸方向における他端面から突出する外壁突出部４７を有する。外壁突出部４７の周方向における中央には、コイル引出スリット４８が形成されている。コイル引出スリット４８を介してインシュレータ９に巻回されたコイル１０が引き出される。
　コイル引出スリット４８からコイルガイド部４９に向けてコイル１０が引き出される方向は、コイル１０を巻回する巻回方向に沿っている。換言すると、コイル引出スリット４８からコイルガイド部４９に向けて引き出されたコイル１０は、第Ｎ巻き目のコイル１０となり、Ｎ回目の巻回によって形成される最後の巻回部である。 The outer wall portion 44 covers the inner side surface 12a of the divided iron core 12. On the outer surface 44a of the outer wall portion 44, an outer receiving recess 53 is formed at an upper position in FIG. 6 via a step portion 53a. The outer receiving recess 53 is formed at a position where the first insulator 17 and the second insulator 18 are connected.
Further, the outer wall portion 44 has an outer wall protruding portion 47 projecting from the other end surface of the divided iron core 12 in the axial direction. A coil extraction slit 48 is formed in the center of the outer wall protrusion 47 in the circumferential direction. The coil 10 wound around the insulator 9 is pulled out through the coil pull-out slit 48.
The direction in which the coil 10 is pulled out from the coil pull-out slit 48 toward the coil guide portion 49 is along the winding direction in which the coil 10 is wound. In other words, the coil 10 drawn from the coil drawing slit 48 toward the coil guide portion 49 becomes the Nth winding coil 10 and is the last winding portion formed by the Nth winding.
　外壁突出部４７の外側面４７ａには、コイルガイド部４９が形成されている。コイルガイド部４９は、外壁部４４の径方向外側で引き回されるコイル１０（渡り線）を収納する。コイルガイド部４９は、周方向に沿う複数（例えば、本実施形態では３個）のガイド溝４９ａを有する。３個のガイド溝４９ａは、径方向に並んで配置されている。各ガイド溝４９ａには、それぞれ同相のコイル１０が収納される。 A coil guide portion 49 is formed on the outer surface 47a of the outer wall protruding portion 47. The coil guide portion 49 houses the coil 10 (crossover wire) routed on the radial outside of the outer wall portion 44. The coil guide portion 49 has a plurality of guide grooves 49a along the circumferential direction (for example, three in the present embodiment). The three guide grooves 49a are arranged side by side in the radial direction. In each guide groove 49a, coils 10 having the same phase are housed.
　内壁部４５は、ティース８を構成する鍔部１５の内側面１５ａ（径方向外側の面）を被覆する。内壁部４５の外側面４５ａには、図６における上側の位置に、内側受入れ凹部５４が段差部５４ａを介して形成されている。内側受入れ凹部５４は、第１インシュレータ１７と第２インシュレータ１８とが接続される位置に形成されている。
　また、内壁部４５は、鍔部１５の軸方向における端面から突出する内壁突出部５２を有する。鍔部１５から突出する内壁突出部５２の突出高さと、分割鉄心１２から突出する外壁突出部４７の突出高さとは、ほぼ同一である。 The inner wall portion 45 covers the inner side surface 15a (diametrically outer surface) of the flange portion 15 constituting the teeth 8. On the outer surface 45a of the inner wall portion 45, an inner receiving recess 54 is formed at an upper position in FIG. 6 via a step portion 54a. The inner receiving recess 54 is formed at a position where the first insulator 17 and the second insulator 18 are connected.
Further, the inner wall portion 45 has an inner wall protruding portion 52 protruding from the end surface of the flange portion 15 in the axial direction. The protruding height of the inner wall protruding portion 52 protruding from the flange portion 15 and the protruding height of the outer wall protruding portion 47 protruding from the split iron core 12 are substantially the same.
　２つの側面被覆部４２，４３の内側面４２ａ，４３ａには、図６における上側の位置に、受入れ凹部５６が段差部５６ａを介して形成されている。受入れ凹部５６は、第１インシュレータ１７と第２インシュレータ１８とが接続される位置に形成されている。受入れ凹部５３の段差部５３ａ，受入れ凹部５４の段差部５４ａ，受入れ凹部５６の段差部５６ａは、同一高さを有し、滑らかに連なっている。
　また、受入れ凹部５６の径方向の中央における大部分の領域には、第１インシュレータ１７のガイド３５に対応する凹部５５が形成されている。 On the inner side surfaces 42a and 43a of the two side surface covering portions 42 and 43, a receiving recess 56 is formed at the upper position in FIG. 6 via the stepped portion 56a. The receiving recess 56 is formed at a position where the first insulator 17 and the second insulator 18 are connected. The stepped portion 53a of the receiving recess 53, the stepped portion 54a of the receiving recess 54, and the stepped portion 56a of the receiving recess 56 have the same height and are smoothly connected to each other.
Further, a recess 55 corresponding to the guide 35 of the first insulator 17 is formed in most of the radial center of the receiving recess 56.
　このような構成のもと、ティース８を挟むように軸方向におけるティース８の両端に第１インシュレータ１７と第２インシュレータ１８とが装着される。第１インシュレータ１７と第２インシュレータ１８とが装着された状態では、第１インシュレータ１７における凹部３３，３４，３６の径方向内側に、第２インシュレータ１８の凹部５３，５４，５６が配置される。これにより、ティース８のティース本体１４の外周面全体、分割鉄心１２の内側面１２ａの全体、及び鍔部１５の内側面１５ａの全体は、隙間なくインシュレータ１７，１８によって覆われる。また、凹部３３，３４，３６，５３，５４，５６により、インシュレータ１７，１８が互いに重なり合った箇所の厚さが、他の箇所の厚さよりも大きくなることが防止される。 Under such a configuration, the first insulator 17 and the second insulator 18 are attached to both ends of the tooth 8 in the axial direction so as to sandwich the tooth 8. In the state where the first insulator 17 and the second insulator 18 are attached, the recesses 53, 54, 56 of the second insulator 18 are arranged inside the recesses 33, 34, 36 in the first insulator 17 in the radial direction. As a result, the entire outer peripheral surface of the tooth body 14 of the teeth 8, the entire inner surface 12a of the split iron core 12, and the entire inner surface 15a of the flange portion 15 are covered by the insulators 17 and 18 without gaps. Further, the recesses 33, 34, 36, 53, 54, 56 prevent the thickness of the portion where the insulators 17 and 18 overlap each other from becoming larger than the thickness of the other portions.
　ティース８に装着されたインシュレータ１７，１８は、端面被覆部２１，４１、側面被覆部２２～４３、外壁部２４，４４、及び内壁部２５，４５によって巻回コイル収容凹部６０を形成する（図２参照）。巻回コイル収容凹部６０にコイル１０が収納されるように、ティース８に装着されたインシュレータ９にコイル１０が集中巻き方式により巻回される。 The insulators 17 and 18 mounted on the teeth 8 form a winding coil accommodating recess 60 by the end face covering portions 21 and 41, the side covering portions 22 to 43, the outer wall portions 24 and 44, and the inner wall portions 25 and 45 (FIG. 2). The coil 10 is wound around the insulator 9 mounted on the teeth 8 by a centralized winding method so that the coil 10 is housed in the winding coil accommodating recess 60.
　次に、図２、図３に基づいて、コイル１０の巻回手順について説明する。
　図２、図３に示すように、コイル１０は、断面形状が長方形であるいわゆる平角線である。このような平角線のコイル１０は、長手方向が径方向に沿うように、かつ短手方向が周方向に沿うように隙間なく整列されて巻回される。なお、図３では、コイル１０に巻数に応じた番号を付している。つまり、インシュレータ９が装着されたティース８に巻回されたコイル１０のうち、例えば、「１」と記載されたコイル１０は、１回目に巻回されたコイル１０であり、第１巻回部である。換言すると、本実施形態では、コイル１０は、第１巻回部～第５３巻回部を有する。 Next, the winding procedure of the coil 10 will be described with reference to FIGS. 2 and 3.
As shown in FIGS. 2 and 3, the coil 10 is a so-called flat wire having a rectangular cross-sectional shape. Such flat wire coils 10 are aligned and wound without gaps so that the longitudinal direction is along the radial direction and the lateral direction is along the circumferential direction. In FIG. 3, the coils 10 are numbered according to the number of turns. That is, among the coils 10 wound around the teeth 8 to which the insulator 9 is mounted, for example, the coil 10 described as "1" is the coil 10 wound for the first time, and is the first winding portion. Is. In other words, in this embodiment, the coil 10 has a first winding portion to a 53rd winding portion.
　前述したように、コイル１０をティース８に巻回する工程においては、コイル１０が最初に第１インシュレータ１７に巻回される（巻き始め）。ティース８に対するコイル１０の巻回が終了した後、コイル１０の巻き終わり端は、第２インシュレータ１８から引き出される。
　より具体的には、第１インシュレータ１７に形成されたコイル導入スリット２８を介してコイル１０が巻回コイル収容凹部６０内に引き込まれる。その後、コイル１０は、第１インシュレータ１７の端面被覆部２１上を通って第２側面被覆部２３側に引き回され、最も分割鉄心１２（外壁部２４，４４）に寄った位置で１回巻回される。つまり、第２側面被覆部２３から第２インシュレータ１８の端面被覆部４１を通って、第１インシュレータ１７の第１側面被覆部２２至るまでコイル１０を引き回し、コイル１０の１回目の巻回工程が終了する。 As described above, in the step of winding the coil 10 around the teeth 8, the coil 10 is first wound around the first insulator 17 (start of winding). After the winding of the coil 10 with respect to the teeth 8 is completed, the winding end end of the coil 10 is pulled out from the second insulator 18.
More specifically, the coil 10 is drawn into the winding coil accommodating recess 60 via the coil introduction slit 28 formed in the first insulator 17. After that, the coil 10 is routed to the second side surface covering portion 23 side through the end surface covering portion 21 of the first insulator 17, and is wound once at the position closest to the divided iron core 12 (outer wall portions 24, 44). It is turned. That is, the coil 10 is routed from the second side surface covering portion 23 through the end surface covering portion 41 of the second insulator 18 to the first side surface covering portion 22 of the first insulator 17, and the first winding step of the coil 10 is performed. finish.
　ここで、コイル導入スリット２８は、径方向外側から径方向内側に向かうに従って、第１側面被覆部２２から第２側面被覆部２３に向かうように斜めに延びている。このため、スムーズに第２側面被覆部２３にコイル１０を導くことができる。
　なお、以下の説明では、各回の巻回工程によってティース８に巻回されるコイル１０を、その回数目のコイル１０と称する。つまり、例えば、１回目の巻回工程のコイル１０は、１回目のコイル１０と称する。換言すると、１回目の巻回工程によって第１巻回部が形成される。 Here, the coil introduction slit 28 extends diagonally from the first side surface covering portion 22 toward the second side surface covering portion 23 from the radial outer side to the radial inner side. Therefore, the coil 10 can be smoothly guided to the second side surface covering portion 23.
In the following description, the coil 10 wound around the teeth 8 in each winding step is referred to as the coil 10 at that number of times. That is, for example, the coil 10 in the first winding step is referred to as the first coil 10. In other words, the first winding step is formed by the first winding step.
　１回目のコイル１０は、その後、径方向内側（鍔部１５側）に向かってコイル１０を１つ分ずらしながら巻回されていく。つまり、コイル１０は、第１側面被覆部２２から第２側面被覆部２３に渡る際、コイル１０を１つ分ずらして斜めに引きまわれる。
　ここで、第１側面被覆部２２の外側面２２ａには凸条部３７が形成されている。凸条部３７は、外側面２２ａにおける外壁部２４（内側面２４ａ）の近くの位置に形成されている。凸条部３７の径方向の幅Ｗ１は、コイル１０の長手方向の幅とほぼ同等である。また、凸条部３７の突出高さＨ１は、コイル１０の短手方向の幅の約１／２程度である。このため、第１側面被覆部２２では、１回目のコイル１０と２回目以降のコイル１０とでは、コイル１０の短手方向における約半分の高さでずれて配置される。 The first coil 10 is then wound while shifting the coil 10 by one toward the inside in the radial direction (the flange portion 15 side). That is, when the coil 10 crosses from the first side surface covering portion 22 to the second side surface covering portion 23, the coil 10 is slanted by shifting the coil 10 by one.
Here, a ridge portion 37 is formed on the outer surface 22a of the first side surface covering portion 22. The ridge portion 37 is formed at a position near the outer wall portion 24 (inner side surface 24a) on the outer surface 22a. The radial width W1 of the ridge portion 37 is substantially the same as the longitudinal width of the coil 10. Further, the protruding height H1 of the ridge portion 37 is about ½ of the width of the coil 10 in the lateral direction. Therefore, in the first side surface covering portion 22, the first coil 10 and the second and subsequent coils 10 are arranged so as to be offset by about half the height in the lateral direction of the coil 10.
　また、端面被覆部２１に位置する凸条部３７の側端、及び、端面被覆部２１の表面２１ａには、凸条部３７と端面被覆部２１とに渡ってコイル収容凹部３８が形成されている。コイル収容凹部３８に１回目に巻回されたコイル１０が収納される。１回目に巻回されたコイル１０が、コイル収容凹部３８の内側面に引っ掛かることで、１回目の巻回工程から２回目の巻回工程に移る際に、１回目のコイル１０の位置がずれることが防止される。 Further, on the side end of the ridge portion 37 located in the end face covering portion 21 and the surface 21a of the end face covering portion 21, a coil accommodating recess 38 is formed over the ridge portion 37 and the end face covering portion 21. There is. The coil 10 wound for the first time is housed in the coil accommodating recess 38. The coil 10 wound for the first time is caught on the inner surface of the coil accommodating recess 38, so that the position of the coil 10 for the first time shifts when moving from the first winding process to the second winding process. Is prevented.
　また、第２側面被覆部２３には、径方向の中央部に、嵩上げ部３９が形成されている。嵩上げ部３９と外壁部２４との間の幅Ｗ３は、コイル１０が４個収まる幅である。嵩上げ部３９の径方向の幅Ｗ２は、コイル１０の長手方向の幅２個分よりも若干小さい程度である。嵩上げ部３９の突出高さＨ２は、コイル１０の短手方向の幅の約１／２程度である。このため、第２側面被覆部２３では、４回目の巻回工程から５回目の巻回工程へと移る際、また、５回目の巻回工程から６回目の巻回工程へと移る際、嵩上げ部３９上にコイル１０が配置される。第２側面被覆部２３では、５回目、６回目のコイル１０と４回目及び７回目以降のコイル１０とでは、コイル１０の短手方向における約半分の高さでずれて配置される。 Further, in the second side surface covering portion 23, a raised portion 39 is formed in the central portion in the radial direction. The width W3 between the raised portion 39 and the outer wall portion 24 is a width in which four coils 10 can be accommodated. The radial width W2 of the raised portion 39 is slightly smaller than the two longitudinal widths of the coil 10. The protruding height H2 of the raised portion 39 is about ½ of the width of the coil 10 in the lateral direction. Therefore, the second side surface covering portion 23 is raised when moving from the fourth winding step to the fifth winding step and when moving from the fifth winding step to the sixth winding step. The coil 10 is arranged on the portion 39. In the second side surface covering portion 23, the coil 10 of the 5th and 6th times and the coil 10 of the 4th and 7th times and thereafter are arranged so as to be offset by about half the height in the lateral direction of the coil 10.
　１１回目のコイル１０は、巻回コイル収容凹部６０の最も鍔部１５（内壁部２５，４５）に寄った位置に配置される。第１側面被覆部２２には、内壁部２５の端部に凸条部３７が形成されているので、第１側面被覆部２２では、１０回目のコイル１０と１１回目以降のコイル１０とで、コイル１０の短手方向における約半分の高さでずれて配置される。 The eleventh coil 10 is arranged at a position closest to the flange portion 15 (inner wall portions 25, 45) of the winding coil accommodating recess 60. Since the convex portion 37 is formed at the end of the inner wall portion 25 in the first side surface covering portion 22, the tenth coil 10 and the eleventh and subsequent coils 10 are formed in the first side surface covering portion 22. The coils 10 are displaced at a height of about half in the lateral direction.
　１２回目のコイル１０の巻回工程は、１１回目のコイル１０の上で行われる。そして、１２回目以降のコイル１０の巻回工程は、分割鉄心１２（外壁部２４，４４）に戻るように順次行われる。２２回目のコイル１０は、再び巻回コイル収容凹部６０の最も分割鉄心１２（外壁部２４，４４）に寄った位置に配置される。２３回目のコイル１０の巻回工程は、２２回目のコイル１０の上で行われる。この後、再び径方向に沿って往復動するようにコイル１０の巻回工程が進む。 The twelfth winding process of the coil 10 is performed on the eleventh coil 10. Then, the 12th and subsequent winding steps of the coil 10 are sequentially performed so as to return to the divided iron core 12 (outer wall portions 24, 44). The 22nd coil 10 is again arranged at a position closest to the divided iron core 12 (outer wall portions 24, 44) of the winding coil accommodating recess 60. The 23rd winding step of the coil 10 is performed on the 22nd coil 10. After that, the winding step of the coil 10 proceeds so as to reciprocate along the radial direction again.
　コイル収納凹部１６ａ（スロット１６）のスペースにより、コイル１０の巻回工程数が５０回に達したところで、コイル１０を分割鉄心１２（外壁部２４，４４）に戻るように折り返して巻回工程を進める。
　ここで、５０回目におけるコイル１０の巻回の位置は、巻回コイル収容凹部６０の径方向のほぼ中央となる。より具体的には、嵩上げ部３９が形成されている位置が、５０回目のコイル１０の巻回位置になる。４９回目のコイル１０と５０回目のコイル１０とは、嵩上げ部３９が形成されている位置に配置される。 When the number of winding steps of the coil 10 reaches 50 times due to the space of the coil storage recess 16a (slot 16), the coil 10 is folded back so as to return to the divided iron core 12 (outer wall portions 24, 44), and the winding step is performed. Proceed.
Here, the winding position of the coil 10 at the 50th time is substantially at the center in the radial direction of the winding coil accommodating recess 60. More specifically, the position where the raised portion 39 is formed is the 50th winding position of the coil 10. The 49th coil 10 and the 50th coil 10 are arranged at positions where the raised portion 39 is formed.
　５０回目で折り返されたコイル１０は、４９回目のコイル１０の隣に配置される。第２側面被覆部２３において、４９回目のコイル１０は、嵩上げ部３９によって４８回目のコイル１０とコイル１０の短手方向における約半分の高さでずれて配置されている。つまり、４９回目のコイル１０は、コイル１０の短手方向における約半分の高さ分だけ、４８回目のコイル１０よりも突出されている。このため、５１回目のコイル１０は、４９回目のコイル１０の突出部分に引っ掛かることで容易に位置決めが行われる。 The coil 10 folded back at the 50th time is placed next to the coil 10 at the 49th time. In the second side surface covering portion 23, the 49th coil 10 is displaced from the 48th coil 10 by the raised portion 39 at a height of about half in the lateral direction. That is, the 49th coil 10 is projected from the 48th coil 10 by about half the height in the lateral direction of the coil 10. Therefore, the 51st coil 10 is easily positioned by being caught in the protruding portion of the 49th coil 10.
　５４回目のコイル１０が第２側面被覆部２３に引き回された位置は、巻回コイル収容凹部６０の最も分割鉄心１２（外壁部２４，４４）に寄った位置となる。５４回目のコイル１０は、第１側面被覆部２２に引き回されることなく、第２インシュレータ１８のコイル引出スリット４８を介して径方向外側に引き出される。このコイル引出スリット４８から引き出された箇所がコイル１０の巻き終わり端となる。これにより、コイル１０の巻回作業が完了する。 The position where the 54th coil 10 is routed to the second side surface covering portion 23 is the position closest to the split iron core 12 (outer wall portions 24, 44) of the winding coil accommodating recess 60. The 54th coil 10 is pulled out radially outward through the coil pull-out slit 48 of the second insulator 18 without being drawn around by the first side surface covering portion 22. The portion drawn out from the coil drawer slit 48 is the winding end end of the coil 10. As a result, the winding work of the coil 10 is completed.
　ここで、５４回目のコイル１０は、完全に１回分だけティース８に巻回されないコイルなので、第１側面被覆部２２では、５３回目のコイル１０と外壁部２４，４４との間にコイル１０の１つ分の隙間（以下、残り隙間という）が生じる。しかしながら、第１インシュレータ１７には凸条部３７が形成されており、４５回目のコイル１０が残り隙間にコイル１０の短手方向における約半分の高さ分だけ、突出されている。この突出部分にコイル１０が引っ掛かることで、５３回目のコイル１０が残り隙間側にずれてしまうことが防止される。 Here, since the 54th coil 10 is a coil that is not completely wound around the teeth 8 only once, in the first side surface covering portion 22, the coil 10 is placed between the 53rd coil 10 and the outer wall portions 24, 44. One gap (hereinafter referred to as the remaining gap) is created. However, the convex portion 37 is formed in the first insulator 17, and the coil 10 at the 45th time is projected from the remaining gap by about half the height in the lateral direction of the coil 10. By catching the coil 10 on this protruding portion, it is possible to prevent the 53rd coil 10 from being displaced toward the remaining gap side.
　分割固定子１１の軸方向両端から引き出されたコイル１０の端末部は、それぞれ結線される。本実施形態では、回転電機１は、３相（Ｕ相、Ｖ相、Ｗ相）のコイルで構成され、コイル１０は、スター結線（Ｙ結線）される。例えば、第１インシュレータ１７のコイル導入スリット２８を介して引き出されたコイル１０の端末部１０ａ（図２参照、巻き始め端）は、中性点として結線される。第２インシュレータ１８のコイル引出スリット４８を介して引き出されたコイル１０の端末部１０ｂ（図２参照、巻き終わり端）は、同相のコイルが互いに結線されて対応する相の図示しない端子に接続される。 The terminal portions of the coil 10 drawn from both ends in the axial direction of the split stator 11 are connected to each other. In the present embodiment, the rotary electric machine 1 is composed of three-phase (U-phase, V-phase, W-phase) coils, and the coil 10 is star-connected (Y-connected). For example, the terminal portion 10a (see FIG. 2, winding start end) of the coil 10 drawn out through the coil introduction slit 28 of the first insulator 17 is connected as a neutral point. The terminal portion 10b (see FIG. 2, winding end end) of the coil 10 drawn out through the coil drawing slit 48 of the second insulator 18 is connected to a terminal (not shown) of the corresponding phase in which coils of the same phase are connected to each other. To.
　このように、図示しない端子に結線されるコイル１０の端末部１０ｂ（巻き終わり端）と、中性点として結線されるコイル１０の端末部１０ａ（巻き始め端）とが、固定子鉄心７を挟んで軸方向の両側に別々に配置される。中性点として結線されるコイル１０の端末部１０ａは、第１インシュレータ１７の渡り線収納部３０に収納されて引き回される。図示しない端子に結線されるコイル１０の端末部１０ｂは、第２インシュレータ１８の各ガイド溝４９ａにそれぞれ同相のコイル１０が収納されて引き回される。 As described above, the terminal portion 10b (winding end end) of the coil 10 connected to the terminal (not shown) and the terminal portion 10a (winding start end) of the coil 10 connected as the neutral point form the stator core 7. It is placed separately on both sides in the axial direction. The terminal portion 10a of the coil 10 connected as a neutral point is housed in the crossover storage portion 30 of the first insulator 17 and is routed. The terminal portion 10b of the coil 10 connected to a terminal (not shown) is routed so that the coil 10 having the same phase is housed in each guide groove 49a of the second insulator 18.
　図示しない各端子を介して所望のコイル１０に電力が供給されることにより、固定子２に所望の鎖交磁束が形成される。この鎖交磁束と回転子３の図示しないマグネットとの間で磁気的な吸引力や反発力が生じ、回転子３が回転される。 By supplying electric power to the desired coil 10 via each terminal (not shown), a desired interlinkage magnetic flux is formed in the stator 2. A magnetic attraction or repulsion is generated between the interlinkage magnetic flux and a magnet (not shown) of the rotor 3, and the rotor 3 is rotated.
　このように上述の実施形態では、ティース８に装着され、かつ、ティース８とコイル１０との絶縁を図るインシュレータ９（第１インシュレータ１７、第２インシュレータ１８）が設けられている。インシュレータ９は、ティース８の軸方向における端面を覆う端面被覆部２１，４１と、ティース８の周方向における両側面を覆う側面被覆部２２～４３と、端面被覆部２１，４１及び側面被覆部２２～４３から立ち上がる外壁部２４，４４及び内壁部２５，４５と、を備える。
　第１インシュレータ１７の第１側面被覆部２２には、２つの凸条部３７が形成されている。また、凸条部３７と端面被覆部２１とに渡ってコイル収容凹部３８が形成されている。このコイル収容凹部３８により、巻回工程の途中においてコイル１０の位置がずれてしまうことを防止できる。
　さらに、凸条部３７を形成した箇所にコイル収容凹部３８を形成することにより、このコイル収容凹部３８が形成される箇所のインシュレータ９の厚さが薄くなってしまうことを防止できる。コイル収容凹部３８を形成するために、第１側面被覆部２２や端面被覆部２１の厚さを無駄に増加する必要がないので、コイル１０の占積率（コイルの断面に占める導体の割合）を向上できる。 As described above, in the above-described embodiment, the insulator 9 (first insulator 17, second insulator 18) that is attached to the teeth 8 and that insulates the teeth 8 from the coil 10 is provided. The insulator 9 includes end face covering portions 21, 41 covering the end faces of the teeth 8 in the axial direction, side covering portions 22 to 43 covering both side surfaces of the teeth 8 in the circumferential direction, end face covering portions 21, 41, and side covering portions 22. The outer wall portions 24, 44 and the inner wall portions 25, 45 rising from the to 43 are provided.
Two ridges 37 are formed on the first side surface covering portion 22 of the first insulator 17. Further, a coil accommodating recess 38 is formed over the ridge portion 37 and the end face covering portion 21. The coil accommodating recess 38 can prevent the position of the coil 10 from being displaced during the winding process.
Further, by forming the coil accommodating recess 38 in the portion where the convex portion 37 is formed, it is possible to prevent the thickness of the insulator 9 in the portion where the coil accommodating recess 38 is formed from becoming thin. Since it is not necessary to unnecessarily increase the thickness of the first side surface covering portion 22 and the end face covering portion 21 in order to form the coil accommodating recess 38, the space factor of the coil 10 (the ratio of the conductor to the cross section of the coil). Can be improved.
　また、凸条部３７を形成することにより、この凸条部３７の上に巻回されるコイル１０の位置を他の巻回工程のコイル１０の位置からずらすことができる。このずれたコイル１０の突出箇所を利用することにより、他の巻回工程によってティース８に巻回されるコイル１０の位置ずれも防止できる。
　また、第１側面被覆部２２のうち、外壁部２４の端部、及び内壁部２５の端部に、凸条部３７が形成されている。このため、とりわけコイル１０の端末部がティース８の軸方向両端から別々に引き出される場合において、コイル１０の位置ずれを確実に防止できる。本実施形態では、５３回目のコイル１０の位置ずれを確実に防止できる。 Further, by forming the ridge portion 37, the position of the coil 10 wound on the ridge portion 37 can be shifted from the position of the coil 10 in another winding step. By utilizing the protruding portion of the misaligned coil 10, it is possible to prevent the misalignment of the coil 10 wound around the teeth 8 by another winding process.
Further, in the first side surface covering portion 22, the ridge portion 37 is formed at the end portion of the outer wall portion 24 and the end portion of the inner wall portion 25. Therefore, especially when the terminal portion of the coil 10 is pulled out separately from both ends in the axial direction of the teeth 8, the misalignment of the coil 10 can be reliably prevented. In this embodiment, the position shift of the coil 10 at the 53rd time can be reliably prevented.
　凸条部３７の突出高さＨ１は、コイル１０の短手方向の幅の約１／２程度である。このため、凸条部３７の上に巻回されたコイル１０が完全にコイル１つ分だけずれてしまうことがなく、確実にコイル１０のずれを防止できる。例えば、凸条部３７によって、コイル１つ分だけずれてしまうと、隣り合うコイル１０の間に引っ掛かりが生じなくなってしまい、凸条部３７を利用したコイル１０のずれを防止できなくなってしまう。上述した実施形態によれば、この問題を解決することができる。 The protruding height H1 of the ridge portion 37 is about ½ of the width of the coil 10 in the lateral direction. Therefore, the coil 10 wound on the ridge portion 37 is not completely displaced by one coil, and the displacement of the coil 10 can be reliably prevented. For example, if the convex portion 37 is displaced by one coil, the coil 10 will not be caught between the adjacent coils 10, and the displacement of the coil 10 using the convex portion 37 cannot be prevented. According to the above-described embodiment, this problem can be solved.
　第１側面被覆部２２のうち、外壁部２４の端部に形成された凸条部３７は、コイル１０の１回目の巻回工程が完了する位置に配置されている。換言すると、凸条部３７は、第１巻き目のコイル１０の位置に配置されている。このため、２回目のコイル１０の巻回工程に進む際、１回目のコイル１０の位置がずれてしまうことを確実に防止できる。また、第１側面被覆部２２と周方向で対向する第２側面被覆部２３に嵩上げ部３９が形成されている。つまり、コイル１０の巻回工程のうち、最後にコイル１０が引き回される第２側面被覆部２３に嵩上げ部３９が形成されている。嵩上げ部３９と外壁部２４との間の幅Ｗ３は、コイル１０が４個収まる幅である。つまり、嵩上げ部３９と外壁部２４との間の幅Ｗ３は、コイル１０の長手方向の幅の約４倍である。このため、嵩上げ部３９と外壁部２４との間に、コイル１０を隙間なく整列させることができる。また、コイル１０を巻回コイル収容凹部６０の径方向の途中で折り返すように巻回した場合であっても、コイル１０の位置ずれを確実に防止できる。つまり、本実施形態では、５０回目の巻回工程から５１回目の巻回工程に進む際にコイル１０がずれてしまうことを確実に防止できる。 Of the first side surface covering portion 22, the ridge portion 37 formed at the end of the outer wall portion 24 is arranged at a position where the first winding step of the coil 10 is completed. In other words, the ridge portion 37 is arranged at the position of the coil 10 of the first winding. Therefore, it is possible to reliably prevent the position of the first coil 10 from being displaced when proceeding to the second winding step of the coil 10. Further, a raised portion 39 is formed on the second side surface covering portion 23 facing the first side surface covering portion 22 in the circumferential direction. That is, in the winding process of the coil 10, the raised portion 39 is formed on the second side surface covering portion 23 to which the coil 10 is finally drawn. The width W3 between the raised portion 39 and the outer wall portion 24 is a width in which four coils 10 can be accommodated. That is, the width W3 between the raised portion 39 and the outer wall portion 24 is about four times the width in the longitudinal direction of the coil 10. Therefore, the coils 10 can be aligned without a gap between the raised portion 39 and the outer wall portion 24. Further, even when the coil 10 is wound so as to be folded back in the middle of the winding coil accommodating recess 60 in the radial direction, the misalignment of the coil 10 can be reliably prevented. That is, in the present embodiment, it is possible to reliably prevent the coil 10 from being displaced when proceeding from the 50th winding step to the 51st winding step.
　嵩上げ部３９の突出高さＨ２は、コイル１０の短手方向の幅の約１／２程度である。このため、嵩上げ部３９の上に巻回されたコイル１０が完全にコイル１つ分だけずれてしまうことがなく、確実にコイル１０のずれを防止できる。 The protruding height H2 of the raised portion 39 is about ½ of the width of the coil 10 in the lateral direction. Therefore, the coil 10 wound on the raised portion 39 is not completely displaced by one coil, and the displacement of the coil 10 can be reliably prevented.
　以上説明した少なくともひとつの実施形態によれば、第１インシュレータ１７の第１側面被覆部２２には、外壁部２４の端部、及び内壁部２５の端部に、凸条部３７が形成されている。また、凸条部３７と端面被覆部２１とに渡ってコイル収容凹部３８が形成されている。このため、巻回工程の途中において平角線であるコイル１０の位置がずれてしまうことを防止できる。 According to at least one embodiment described above, the first side surface covering portion 22 of the first insulator 17 has a ridge portion 37 formed at an end portion of the outer wall portion 24 and an end portion of the inner wall portion 25. There is. Further, a coil accommodating recess 38 is formed over the ridge portion 37 and the end face covering portion 21. Therefore, it is possible to prevent the position of the coil 10, which is a flat wire, from being displaced during the winding process.
　なお、上述の実施形態では、固定子２（固定子鉄心７）は、分割固定子１１を環状に連結して構成される場合について説明した。分割固定子１１の個数は、２４個である場合について説明した。しかしながら、実施形態は、この構成に限られない。固定子２（固定子鉄心７）は、周方向に分割可能な方式が採用されていなくてもよい。
　上述の実施形態では、凸条部３７の突出高さＨ１及び嵩上げ部３９の突出高さＨ２は、コイル１０の短手方向の幅の約１／２程度である場合について説明した。しかしながら、実施形態は、この構成に限られない。各突出高さＨ１は、コイル１０の短手方向の幅よりも小さければよい。 In the above-described embodiment, the case where the stator 2 (statator core 7) is configured by connecting the split stator 11 in a ring shape has been described. The case where the number of the partition stators 11 is 24 has been described. However, the embodiment is not limited to this configuration. The stator 2 (stator core 7) does not have to adopt a method that can be divided in the circumferential direction.
In the above-described embodiment, the case where the protruding height H1 of the convex portion 37 and the protruding height H2 of the raised portion 39 are about ½ of the width in the lateral direction of the coil 10 has been described. However, the embodiment is not limited to this configuration. Each protrusion height H1 may be smaller than the width of the coil 10 in the lateral direction.
　上述の実施形態では、第１インシュレータ１７の第１側面被覆部２２には、外壁部２４の端部、及び内壁部２５の端部に、凸条部３７及びコイル収容凹部３８が形成されている場合について説明した。しかしながら、実施形態は、この構成に限られない。第１側面被覆部２２のうち、外壁部２４の端部、及び内壁部２５の端部の少なくともいずれか一方に凸条部３７及びコイル収容凹部３８が形成されていればよい。
　上述の実施形態では、嵩上げ部３９と外壁部２４との間の幅Ｗ３は、コイル１０が４個収まる幅である場合について説明した。しかしながら、実施形態は、この構成に限られない。嵩上げ部３９と外壁部２４との間の幅Ｗ３は、コイル１０の長手方向の幅の整数倍であればよい。このように構成することで、巻回コイル収容凹部６０内でコイル１０を確実に整列させることができる。 In the above-described embodiment, the first side surface covering portion 22 of the first insulator 17 is formed with a convex portion 37 and a coil accommodating recess 38 at the end portion of the outer wall portion 24 and the end portion of the inner wall portion 25. The case was explained. However, the embodiment is not limited to this configuration. The ridge portion 37 and the coil accommodating recess 38 may be formed on at least one of the end portion of the outer wall portion 24 and the end portion of the inner wall portion 25 in the first side surface covering portion 22.
In the above-described embodiment, the case where the width W3 between the raised portion 39 and the outer wall portion 24 is a width in which four coils 10 can be accommodated has been described. However, the embodiment is not limited to this configuration. The width W3 between the raised portion 39 and the outer wall portion 24 may be an integral multiple of the width in the longitudinal direction of the coil 10. With this configuration, the coils 10 can be reliably aligned in the winding coil accommodating recess 60.
　上述の実施形態では、コイル収容凹部３８が、凸条部３７の角部と端面被覆部２１の表面２１ａの一部とを平面取りした形状を有する場合について説明した。しかしながら、実施形態は、この構成に限られない。凸条部３７の角部と端面被覆部２１の表面２１ａの一部と切除してコイル収容凹部３８が形成されればよい。 In the above-described embodiment, the case where the coil accommodating recess 38 has a shape in which the corner portion of the convex portion 37 and a part of the surface 21a of the end surface covering portion 21 are flattened has been described. However, the embodiment is not limited to this configuration. The coil accommodating recess 38 may be formed by cutting off the corner portion of the ridge portion 37 and a part of the surface 21a of the end face covering portion 21.
　上述の実施形態では、インシュレータ９が装着されたティース８にコイル１０が合計５４回巻回される場合について説明した。しかしながら、実施形態は、この構成に限られない。コイル１０の巻数は任意に設定することができる。また、コイル１０の巻数に応じて巻回コイル収容凹部６０の径方向の途中からコイル１０を折り返す位置も変化させてよい。この折り返す位置に応じて嵩上げ部３９を形成すればよい。 In the above-described embodiment, the case where the coil 10 is wound around the teeth 8 to which the insulator 9 is mounted a total of 54 times has been described. However, the embodiment is not limited to this configuration. The number of turns of the coil 10 can be set arbitrarily. Further, the position where the coil 10 is folded back may be changed from the middle of the winding coil accommodating recess 60 in the radial direction according to the number of turns of the coil 10. The raised portion 39 may be formed according to the folded position.
　本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれると同様に、特許請求の範囲に記載された発明とその均等の範囲に含まれるものである。 Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and variations thereof are included in the scope of the invention described in the claims and the equivalent scope thereof, as are included in the scope and gist of the invention.
　１…回転電機、２…固定子、３…回転子、５…回転子鉄心、８…ティース、９…インシュレータ、１０…コイル（平角線）、１７…第１インシュレータ（インシュレータ）、１８…第２インシュレータ（インシュレータ）、２１…端面被覆部、２２…第１側面被覆部（側面被覆部）、２３…第２側面被覆部（側面被覆部）、２４…外壁部（第１壁部）、２５…内壁部（第２壁部）、３７…凸条部、３８…コイル収容凹部（凹部）、３９…嵩上げ部、Ｈ１，Ｈ２…突出高さ 1 ... Rotating machine, 2 ... Stator, 3 ... Rotor, 5 ... Rotor iron core, 8 ... Teeth, 9 ... Insulator, 10 ... Coil (flat wire), 17 ... First insulator (insulator), 18 ... Second Insulator (insulator), 21 ... end face covering part, 22 ... first side surface covering part (side surface covering part), 23 ... second side surface covering part (side surface covering part), 24 ... outer wall part (first wall part), 25 ... Inner wall part (second wall part), 37 ... convex part, 38 ... coil accommodating recess (concave part), 39 ... raised part, H1, H2 ... protruding height

Claims (8)

  1. 　環状の固定子鉄心の径方向における一側面から前記径方向に沿って延びるティースに装着され、前記ティースに複数の巻数で巻回される平角線と前記ティースとの絶縁を確保するインシュレータであって、
    　前記ティースの軸方向における端面を覆う端面被覆部と、
    　前記ティースの周方向における両側面を覆う２つの側面被覆部と、
    　前記端面被覆部及び前記２つの側面被覆部における前記径方向の一端から立ち上がる第１壁部と、
    　前記端面被覆部及び前記２つの側面被覆部における前記径方向の他端から立ち上がる第２壁部と、
    　前記第１壁部の側端及び前記第２壁部の側端の少なくともいずれか一方に突出して形成され、前記軸方向に延びる凸条部と、
    　前記凸条部と前記端面被覆部とに渡って形成され、前記平角線を収容する凹部と、を備え、
    　前記２つの側面被覆部のうち一方の側面被覆部には、前記複数の巻数で前記ティースに巻回される前記平角線のうちの第１巻き目の前記平角線が配置され、かつ、前記凸条部及び前記凹部が形成されている、
    　インシュレータ。     An insulator that is attached to a tooth extending along the radial direction from one side surface of the annular stator core in the radial direction and secures insulation between the tooth and a flat wire wound around the tooth in a plurality of turns. ,
    An end face covering portion that covers the end face in the axial direction of the teeth,
    Two side coverings covering both sides of the tooth in the circumferential direction,
    A first wall portion rising from one of the radial ends of the end face covering portion and the two side surface covering portions, and a first wall portion.
    A second wall portion rising from the other end in the radial direction in the end face covering portion and the two side surface covering portions, and a second wall portion.
    A convex portion formed by projecting from at least one of a side end of the first wall portion and a side end of the second wall portion and extending in the axial direction, and a convex portion.
    It is provided with a recess formed over the ridge portion and the end face covering portion and accommodating the flat wire.
    The flat wire of the first roll of the flat wire wound around the tooth with the plurality of turns is arranged on the side covering portion of one of the two side covering portions, and the convex wire is arranged. The strip and the recess are formed,
    Insulator.
  2. 　前記側面被覆部の前記第１壁部の側端及び前記第２壁部の側端のいずれにも前記凸条部が形成されている、
    　請求項１に記載のインシュレータ。     The ridge portion is formed on both the side end of the first wall portion and the side end of the second wall portion of the side surface covering portion.
    The insulator according to claim 1.
  3. 　前記凸条部の突出高さは、前記平角線の短手方向における厚さよりも小さい、
    　請求項１又は請求項２に記載のインシュレータ。     The protruding height of the ridge portion is smaller than the thickness of the flat wire in the lateral direction.
    The insulator according to claim 1 or 2.
  4. 　前記２つの側面被覆部は、第１側面被覆部及び第２側面被覆部であり、
    　前記第１側面被覆部には、前記第１巻き目の前記平角線が配置され、かつ、前記凸条部及び前記凹部が形成されており、
    　前記第２側面被覆部は、前記第２側面被覆部から突出して形成されているとともに前記軸方向に延びる嵩上げ部を備え、
    　前記嵩上げ部と前記第１壁部との間の幅は、前記平角線の前記径方向の幅の整数倍である、
    　請求項１から請求項３のいずれか一項に記載のインシュレータ。     The two side surface covering portions are a first side surface covering portion and a second side surface covering portion.
    The flat wire of the first roll is arranged on the first side surface covering portion, and the convex portion and the concave portion are formed.
    The second side surface covering portion is formed so as to project from the second side surface covering portion and includes a raised portion extending in the axial direction.
    The width between the raised portion and the first wall portion is an integral multiple of the radial width of the flat wire.
    The insulator according to any one of claims 1 to 3.
  5. 　前記嵩上げ部の突出高さは、前記平角線の短手方向における厚さよりも小さい、
    　請求項４に記載のインシュレータ。     The protruding height of the raised portion is smaller than the thickness of the flat wire in the lateral direction.
    The insulator according to claim 4.
  6. 　前記平角線の巻き始め端と巻き終わり端とは、前記ティースの前記軸方向の両側に別々に配置されている、
    　請求項１から請求項５のいずれか一項に記載のインシュレータ。     The winding start end and the winding end end of the flat wire are separately arranged on both sides of the tooth in the axial direction.
    The insulator according to any one of claims 1 to 5.
  7. 　請求項１から請求項６のいずれか一項に記載のインシュレータと、
    　前記インシュレータが装着される前記ティースと、
    　前記ティースと一体化された前記固定子鉄心と、
    　を備える、
    　固定子。     The insulator according to any one of claims 1 to 6, and the insulator.
    The teeth to which the insulator is attached and
    With the stator core integrated with the teeth,
    To prepare
    stator.
  8. 　請求項７に記載の固定子と、
    　前記固定子に対して回転自在に設けられた回転子と、
    　を備える、
    　回転電機。     The stator according to claim 7 and
    A rotor provided rotatably with respect to the stator and
    To prepare
    Rotating machine.
PCT/JP2021/016896 2020-06-11 2021-04-28 Insulator, stator, and rotating electrical machine WO2021251022A1 (en)

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JP2004312795A (en) * 2003-04-02 2004-11-04 Honda Motor Co Ltd Coil of rotary electric machine
JP2006320167A (en) * 2005-05-16 2006-11-24 Nissan Motor Co Ltd Stator structure for dynamo-electric machine
JP2008148515A (en) * 2006-12-13 2008-06-26 Nissan Motor Co Ltd Stator and its manufacturing method
JP2009118574A (en) * 2007-11-02 2009-05-28 Nissan Motor Co Ltd Winding structure of rotating electrical machine
JP2015133808A (en) 2014-01-10 2015-07-23 アスモ株式会社 Insulator and stator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004312795A (en) * 2003-04-02 2004-11-04 Honda Motor Co Ltd Coil of rotary electric machine
JP2006320167A (en) * 2005-05-16 2006-11-24 Nissan Motor Co Ltd Stator structure for dynamo-electric machine
JP2008148515A (en) * 2006-12-13 2008-06-26 Nissan Motor Co Ltd Stator and its manufacturing method
JP2009118574A (en) * 2007-11-02 2009-05-28 Nissan Motor Co Ltd Winding structure of rotating electrical machine
JP2015133808A (en) 2014-01-10 2015-07-23 アスモ株式会社 Insulator and stator

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